In the wake of what appears to be a severe constraint of top case assemblies with integrated batteries, Apple has informed its Genius Bar employees and Apple Authorized Service Providers it is currently unable to service the batteries of 15-inch MacBook Pro with Retina display models released in Mid 2012 and Early 2013.

The battery replacement is typically free of charge with an AppleCare+ plan, but can retail for $199 in the United States, £199 in the UK, or $259 in Canada for out-of-warranty replacements.

According to Apple’s internal directive, top case assemblies with batteries for the aforementioned MacBook Pro models will remain severely constrained until September 15, 2017. The directive does not identify a reason for the shortage, which has been ongoing since at least March.